from animal, vegetable, miracle: agricultural plant diversity

Headed to the grocery store today? Read this beforehand:

[from page 49 of Animal, Vegetable, Miracle] According to Indian crop ecologist Vandana Shiva, humans have eaten some 80,000 plant species in our history. After recent precipitous changes, three-quarters of all human food now comes from just eight species, with the field quickly narrowing down to genetically modified corn, soy, and canola.